first commit

nodes/broker/vp_xml_file_broker_node.h

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+#pragma once
+
+#include <fstream>
+
+#include "vp_msg_broker_node.h"
+#include "cereal_archive/vp_objects_cereal_archive.h"
+
+namespace vp_nodes {
+    // message broker node (for demo/debug purpose), broke xml data to file.
+    class vp_xml_file_broker_node: public vp_msg_broker_node
+    {
+    private:
+        // xml file writer
+        ofstream xml_writer;
+    protected:
+        // to xml
+        virtual void format_msg(const std::shared_ptr<vp_objects::vp_frame_meta>& meta, std::string& msg) override;
+        // to file
+        virtual void broke_msg(const std::string& msg) override;
+    public:
+        vp_xml_file_broker_node(std::string node_name, 
+                                vp_broke_for broke_for = vp_broke_for::NORMAL, 
+                                std::string file_path_and_name = "",
+                                int broking_cache_warn_threshold = 50, 
+                                int broking_cache_ignore_threshold = 200);
+        ~vp_xml_file_broker_node();
+    };
+}